Qty. Component $/Unit Subtotal
22 M3 x 10mm Screws $0.08 $1.76
8 M3 x 25mm Screws $0.17 $1.36
12 M3 x 30mm Screws $0.17 $2.04
6 M3 x 5mm Setscrews $0.25 $1.50
22 M3 Locknuts $0.04 $0.88
4 M4 x 5mm Setscrews $0.25 $1.00
141 M5 x 10mm Screws $0.12 $16.92
23 M5 x 16mm Screws $0.17 $3.91
42 M5 x 30mm Screws $0.27 $11.34
56 M5 Washers $0.03 $1.68
16 M5 x 6mm Spacers $0.20 $3.20
14 M5 x 6mm Eccentric Spacers $2.00 $28.00
61 M5 Locknuts $0.08 $4.88
147 M5 Tee Nuts $0.28 $41.16
32 Wood Screws $0.05 $1.60
611 TOTALS   $121.23

M3 Screws

Trade Name M3 Low-Profile Socket Head Cap Screw
Material 10mm, 20mm - Type 316 Stainless Steel
30mm - 18-8 Stainless Steel
Lengths 10mm, 20mm, and 30mm
Threads M3 x 0.5mm
Head Height 2mm
Head Diameter 5.5mm
Socket Size 2mm Hex
Tensile Strength 70,000 psi
Recommended Supplier McMaster Carr (United States)
Supplier Part Numbers 10mm - 90666A105
25mm
30mm - 92855A335
Price 10mm - $9.19/pack of 100 ($0.09 each)
25mm
30mm - $8.40/pack of 25 ($0.34 each)
Quantity Needed 10mm - 22
25mm - 8
30mm - 12

M3 Setscrews

Two of these setscrews are used to secure each GT2 pulley to the motor’s shaft. The cup edge is knurled for gripping strength so these screws resist loosening.

Trade Name Knurl Grip Cup Point Set Screw
Material 18-8 Stainless Steel
Length 5mm
Threads M3 x 0.5mm
Hex Size 1.5mm
RoHS Compliant
Recommended Supplier McMaster Carr (United States)
Supplier Part Number 91313A122
Price $6.22/pack of 25 ($0.25 each)
Quantity Needed 6

M4 Setscrews

These setscrews are used to secure the Z-Axis flex coupling to the lead screw and to the Z-Axis motor’s primary shaft. The cup edge is knurled for gripping strength so these screws resist loosening.

Trade Name Knurl Grip Cup Point Set Screw
Material 18-8 Stainless Steel
Length 5mm
Threads M4 x 0.7mm
Hex Size 2mm
RoHS Compliant
Recommended Supplier McMaster Carr (United States)
Supplier Part Number 91313A137
Price $6.30/pack of 25 ($0.25 each)
Quantity 4

M3 Locknuts

Twelve of these locknuts are used to secure the UTM electronic pin screws in place. The nylon insert allows them to resist loosening when subjected to vibration.

Trade Name Nylon-Insert Locknut
Threads M3 x 0.5mm
Height 4mm
Width 5.5mm
Material 18-8 Stainless Steel
RoHS Compliant
Recommended Supplier McMaster Carr - Part Number 93625A100 (United States)
Price $5.10/pack of 100 ($0.05 each)
Quantity 22

M5 Screws

M5 button-head screws of various lengths are used throughout FarmBot to attach plates and 3D printed parts to extrusions, V-wheels to plates, and other components together. They are usually used in combination with M5 washers, and terminated with an M5 tee nut or locknut. The button head provides a wide bearing surface, a low-profile head, and a finished appearance. Length is measured from under the head.

Trade Name Button-Head Socket Cap Screw
Material 18-8 Stainless Steel
Tensile Strength 70,000psi
Lengths 10, 16, and 30mm
Threads M5, 0.8 pitch
Head Type 3mm Hex
Head Height 2.75mm
Head Diameter 9.5mm
Recommended Supplier McMaster Carr (United States)
Supplier Part Numbers 10mm - 92095A208
16mm - 92095A212
30mm - 92095A218
Price 10mm - $11.98/box of 100 ($0.12/piece)
16mm - $8.31/box of 50 ($0.17/piece)
30mm - $6.76/box of 25 ($0.27/piece)
Quantity Needed 10mm - 141
16mm - 23
30mm - 42

M5 Washers

These washers are used throughout FarmBot in combination with M5 screws and M5 locknuts. They allow nuts to be tightened on plastic components and plates while preventing damage and distributing load.

Material 18-8 Stainless Steel
Outer Diameter 10mm
Inner Diameter 5.3mm
Thickness 0.9 to 1.1mm
Recommended Supplier McMaster Carr (United States)
Supplier Part Number 93475A240
Price $2.57/pack of 100 ($0.03/piece)
Quantity Needed 56

M5 Spacers

These spacers are used to offset V-wheels from plates so that they may engage extrusions.

Material Aluminum
Outer Diameter 10mm
Inner Diameter 5.10mm
Length 6mm
Recommended Supplier OpenBuilds (United States)
Price $0.20/each
Quantity Needed 16

M5 x 6mm Eccentric Spacers

When rotated, eccentric spacers accurately position V-wheels on a plate such that they can firmly engage V-slot aluminum extrusions. They are only used on wheels on one side of an extrusion. Adjustments are made by using a 8mm wrench on the spacer itself.

Material Stainless Steel
Height 6mm (not including rim)
Bore 5mm
Rim Fits into a 7.12mm hole
Hex Size 8mm
Divot Indicates shortest distance from rim to bore
Recommended Supplier OpenBuilds (United States)
Price $2.00 each
Quantity Needed 14

M5 Locknuts

These nuts resist loosening because their nylon insert grips the screw that they are attached to. They are used in combination with M5 screws throughout FarmBot.

Material 18-8 Stainless Steel
Hex Size 8mm
Height 5mm
Threads M5 x 0.8 pitch
Locking Mechanism Nylon Insert
Recommended Supplier McMaster Carr (United States)
Supplier Part Number 93625A200
Price $6.30/pack of 100 ($0.06/piece)
Quantity Needed 61

M5 Tee Nuts

Combined with M5 screws, these drop-in style tee nuts allow components such as plates and 3D printed parts to be attached quickly and securely anywhere on a V-slot aluminum extrusion.

Material Stainless Steel
Threads M5 x 0.8mm pitch
Fits Slot Size 6
Recommended Supplier Peaksight Technologies
Price $0.28/each
Quantity Needed 147

Wood Screws

These are used to attach the track end plates and track joining plates to supporting infrastructure such as a raised.

Material Steel
Finish Zinc Plated
Length 1 inch
Head Diameter 0.438 inches
Recommended Supplier Home Depot (United States)
Price $4.76/pack of 100
Quantity Needed 32